| import { isArray } from '../util/isArray'; |
| import { fromArray } from './fromArray'; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| export function race(...observables) { |
| if (observables.length === 1) { |
| if (isArray(observables[0])) { |
| observables = observables[0]; |
| } |
| else { |
| return observables[0]; |
| } |
| } |
| return fromArray(observables, undefined).lift(new RaceOperator()); |
| } |
| export class RaceOperator { |
| call(subscriber, source) { |
| return source.subscribe(new RaceSubscriber(subscriber)); |
| } |
| } |
| export class RaceSubscriber extends OuterSubscriber { |
| constructor(destination) { |
| super(destination); |
| this.hasFirst = false; |
| this.observables = []; |
| this.subscriptions = []; |
| } |
| _next(observable) { |
| this.observables.push(observable); |
| } |
| _complete() { |
| const observables = this.observables; |
| const len = observables.length; |
| if (len === 0) { |
| this.destination.complete(); |
| } |
| else { |
| for (let i = 0; i < len && !this.hasFirst; i++) { |
| let observable = observables[i]; |
| let subscription = subscribeToResult(this, observable, observable, i); |
| if (this.subscriptions) { |
| this.subscriptions.push(subscription); |
| } |
| this.add(subscription); |
| } |
| this.observables = null; |
| } |
| } |
| notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) { |
| if (!this.hasFirst) { |
| this.hasFirst = true; |
| for (let i = 0; i < this.subscriptions.length; i++) { |
| if (i !== outerIndex) { |
| let subscription = this.subscriptions[i]; |
| subscription.unsubscribe(); |
| this.remove(subscription); |
| } |
| } |
| this.subscriptions = null; |
| } |
| this.destination.next(innerValue); |
| } |
| } |
| //# sourceMappingURL=race.js.map |